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Seat Belt Warning Chime Does Not Operate

WARNING: This page is about a different car, the 2005 Nissan Titan. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK WARNING CHIME OPERATION 
    1. With key removed from the ignition and the front door LH open, turn the lighting switch to 1st or 2nd position.
    2. Return lighting switch to OFF position, and insert key into ignition.

    Does warning chime sound for both steps? 

    1. YES: GO TO 2.
    2. NO: Go to "ALL WARNING CHIMES DO NOT OPERATE ".
  2. CHECK SEAT BELT WARNING LAMP OPERATION 

    Turn ignition switch ON. Buckle and unbuckle the driver seat belt while watching seat belt warning lamp.

    When seat belt is fastened: Warning lamp OFF 

    When seat belt is unfastened: Warning lamp ON 

    OK or NG 

    1. OK: Replace the BCM. Refer to "REMOVAL AND INSTALLATION OF BCM ".
    2. NG: GO TO 3.
  3. CHECK COMBINATION METER INPUT SIGNAL 
    1. Turn ignition switch ON.
    2. Check voltage between combination meter harness connector M24 terminal 27 (O/B) and ground.

      When seat belt is fastened: Approx. 12V 

      When seat belt is unfastened: Approx. 0V 

      3. Fig 1: Checking Voltage Between Combination Meter Harness Connector M24 Terminal 27 (O/B) And Ground
      G03605046Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    1. OK: Replace the combination meter. Refer to "COMBINATION METER ".
    2. NG: GO TO 4.
  4. CHECK SEAT BELT BUCKLE SWITCH 
    1. Turn ignition switch OFF.
    2. Disconnect seat belt buckle switch LH connector.
    3. Check continuity between seat belt buckle switch LH harness connector B12 terminals 1 and 2.

      When seat belt is fastened: Continuity should exist 

      When seat belt is unfastened: Continuity should not exist 

      Fig 2: Checking Continuity Between Seat Belt Buckle Switch LH Harness Connector B12 Terminals 1 And 2
      G03605047Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    1. OK: GO TO 5.
    2. NG: Replace the seat belt buckle switch LH.
  5. CHECK SEAT BELT BUCKLE SWITCH CIRCUIT 
    1. Disconnect combination meter connector.
    2. Check continuity between combination meter harness connector M24 terminal 27 (O/B) and seat belt buckle switch LH harness connector B12 terminal 1 (O/B).

      Continuity should exist  .

    3. Check continuity between combination meter harness connector M24 terminal 27 (O/B) and ground.

      Continuity should not exist  .

      4. Fig 3: Checking Continuity Between Combination Meter Harness Connector M24 Terminal 27 And Seat Belt Buckle Switch LH Harness Connector B12 Terminal 1 And Ground
      G03605048Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    1. OK: GO TO 6.
    2. NG: Repair harness or connector.
  6. CHECK SEAT BELT BUCKLE SWITCH GROUND CIRCUIT 

    Check continuity between seat belt buckle switch LH harness connector B12 terminal 2 (B) and ground.

    Continuity should exist  .

    Fig 4: Checking Continuity Between Seat Belt Buckle Switch LH Harness Connector B12 Terminal 2 (B) And Ground
    G03605049Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    1. OK: Replace combination meter. Refer to "COMBINATION METER ".
    2. NG: Repair harness or connector.
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